From 166f6981de05d809fbd3d19bbb4e0ba21f1f9b66 Mon Sep 17 00:00:00 2001
From: Patrick King <patrick@patrickcking.com>
Date: Mon, 1 Jul 2024 10:02:56 -0700
Subject: [PATCH] More Muting

I wanted to sync muting audio input devices when I mute audio output devices.
---
 tilde/.hammerspoon/init.lua                |  2 ++
 tilde/.hammerspoon/system/audioControl.lua | 40 ++++++++++++++++++----
 tilde/.hammerspoon/system/keytrap.lua      | 16 +++++++++
 3 files changed, 52 insertions(+), 6 deletions(-)
 create mode 100644 tilde/.hammerspoon/system/keytrap.lua

diff --git a/tilde/.hammerspoon/init.lua b/tilde/.hammerspoon/init.lua
index 9f22c2cd..9269c865 100644
--- a/tilde/.hammerspoon/init.lua
+++ b/tilde/.hammerspoon/init.lua
@@ -110,6 +110,7 @@ Dock = require("system/dock")
 networking = require("system/networking")
 -- Ping = require("system/Ping") -- needs work
 videoCalls = require("system/videoCalls")
+-- Keytrap = require("system/keytrap")
 
 
 audioControl.init()
@@ -120,6 +121,7 @@ Dock.init()
 networking.init()
 -- Ping.init() -- needs work
 videoCalls.init()
+-- Keytrap.init()
 -- ========================================================================= }}}
 
 -- App configuration ======================================================= {{{
diff --git a/tilde/.hammerspoon/system/audioControl.lua b/tilde/.hammerspoon/system/audioControl.lua
index b3dcc3ea..5476140e 100644
--- a/tilde/.hammerspoon/system/audioControl.lua
+++ b/tilde/.hammerspoon/system/audioControl.lua
@@ -50,6 +50,26 @@ local function internalOrExternalMic()
     _log("Unable to set any mic as default")
     return 1
 end
+local function perDeviceWatcher(dev_uid, event_name, event_scope, event_element)
+    local device = hs.audiodevice.findDeviceByUID(dev_uid)
+    if device and event_name == "mute" then
+        _log("\"" .. device:name() .. "\" mute state has changed.")
+        audioControl.matchInputMuteToOutputMute()
+        sleep(1)
+    end
+end
+
+local function startOutputWatcher()
+    local defaultOutput = hs.audiodevice.defaultOutputDevice()
+
+    if defaultOutput:watcherIsRunning() then
+        _log("Audio watcher for " .. defaultOutput:name() .. " already exists.")
+    else
+        _log("No audio watcher found for " .. defaultOutput:name() .. " starting one.")
+        defaultOutput:watcherCallback(perDeviceWatcher)
+        defaultOutput:watcherStart()
+    end
+end
 
 local function audioDeviceChanged(arg)
     local outputRetval = 1
@@ -66,6 +86,7 @@ local function audioDeviceChanged(arg)
         sleep(5)
 
         _log("New audio device detected. Current values: Speaker: " .. hs.audiodevice.defaultOutputDevice():name() .. " Mic: " .. hs.audiodevice.defaultInputDevice():name())
+        startOutputWatcher()
 
         outputRetval = internalOrExternalSpeaker()
         micRetval = internalOrExternalMic()
@@ -89,14 +110,12 @@ local function trapVolumeControls()
 
                     -- Send mute to external monitor if connected and it's the default audio output
                     if event["key"] == "MUTE" then
-                        if isMuted == false then
-                            isMuted = true
-                            run.cmd("/Users/patrickking/bin/m1ddc", { "set", "mute", "on" })
-                            _log("Muted external monitor.")
-                        else
-                            isMuted = false
+                        if hs.audiodevice.defaultOutputDevice():outputMuted() then
                             run.cmd("/Users/patrickking/bin/m1ddc", { "set", "mute", "off" })
                             _log("Unmuted external monitor.")
+                        else
+                            run.cmd("/Users/patrickking/bin/m1ddc", { "set", "mute", "on" })
+                            _log("Muted external monitor.")
                         end
                         return true
                     end
@@ -128,6 +147,7 @@ function audioControl.init()
     local initStart = os.clock()
     hs.audiodevice.watcher.setCallback(audioDeviceChanged)
     hs.audiodevice.watcher.start()
+    startOutputWatcher()
 
     trapVolumeControls()
     hs.hotkey.bind({'cmd', 'shift'}, "k", function() audioControl.mediaControls("PLAY") end)
@@ -137,6 +157,14 @@ function audioControl.init()
     _log(debug.getinfo(1, "S").short_src:gsub(".*/", "") .. " loaded in " .. (os.clock() - initStart) .. " seconds.")
 end
 
+function audioControl.matchInputMuteToOutputMute()
+    if hs.audiodevice.defaultOutputDevice():muted() then
+        audioControl.muteInputs()
+    else
+        audioControl.unmuteInputs()
+    end
+end
+
 function audioControl.muteInputs()
     for _, device in pairs(hs.audiodevice.allInputDevices()) do
         device:setInputMuted(true)
diff --git a/tilde/.hammerspoon/system/keytrap.lua b/tilde/.hammerspoon/system/keytrap.lua
new file mode 100644
index 00000000..067bcf11
--- /dev/null
+++ b/tilde/.hammerspoon/system/keytrap.lua
@@ -0,0 +1,16 @@
+local keytrap = {}
+
+local function keytrap_router()
+    systemeventtap = hs.eventtap.new({ hs.eventtap.event.types.systemDefined }, function(mainEvent)
+        local event = mainEvent:systemKey()
+        local flags = hs.eventtap.checkKeyboardModifiers()
+
+    end)
+    systemeventtap:start()
+end
+
+function keytrap.init()
+    keytrap_router()
+end
+
+return keytrap